The phrase "a spate of speculation" is correct and usable in written English.
It can be used to describe a sudden increase or surge in conjecture or theories about a particular topic or event.
Example: "Following the unexpected announcement, there was a spate of speculation regarding the company's future plans."
Alternatives: "a flurry of speculation" or "a wave of speculation".
A spate of speculation put some life into the market, pushing the FTSE 100 to its highest level since June 2008.
A spate of speculation helped a nervous market end the day on a positive note, despite continuing worries about the eurozone crisis.
This discovery is bound to prompt a spate of speculation by early Renaissance specialists about the reasons for this so far unique way of presenting a large devotional panel.
Austen's Darcy turns 200 this year (in case it's been possible to miss that marketing juggernaut) and there's been a spate of speculation on his endurance, his various incarnations, and why Jane Austen is inimitable.
But a spate of takeover speculation proved a welcome distraction from the never-ending eurozone crisis.
On a day when the market was searching for direction, things were livened up by a spate of merger speculation.
Investors shook off interest rate worries for once, preferring to concentrate on a spate of takeover speculation surrounding the likes of Whitbread and Sainsbury's.
As leading shares recovered from early losses to record a second day of gains - just - there was even a spate of takeover speculation.
A spate of takeover speculation and optimism about the banking sector helped push the FTSE 100 back above 5000 for the first time in just over a week.
A spate of takeover speculation involving a number of mid-cap companies excited investors, but failed to stop a late slide in the overall market.
Meanwhile with hopes of a Greek deal not yet dashed ahead of crucial Eurogroup and EU leaders meetings - as well as a spate of takeover speculation - the FTSE 100 is currently up 86.46 points at 6796.91.
